The first Earth Day was held on April 22, 1970. The occasion was first conceived by Gaylord Nelson, a U.S. Senator from Wisconsin, as a national day of observance for environmental problems. Millions of people participated in events across the country, while thousands of schools held special educational sessions, all dealing with environmental concerns. Earth Day has since become an annual event, celebrated worldwide.
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International media Interoperability Framework
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more.